Sensitivity | Specificity | PV+ | PV− | κ | κ 95% CI | |
Diagnosis criteria | ||||||
definite cases | 72.7 | 90.7 | 78.7 | 87.5 | 0.65 | 0.53, 0.76 |
possible cases | 31.6 | 95.8 | 85.7 | 63.9 | 0.29 | 0.05, 0.53 |
all cases | 63.5 | 91.4 | 79.4 | 82.8 | 0.58 | 0.47, 0.69 |
Demographic and lifestyle characteristics | ||||||
gender | ||||||
men | 35.7 | 96.7 | 83.3 | 76.3 | 0.38 | 0.10, 0.67 |
women | 69.0 | 90.2 | 79.0 | 84.5 | 0.61 | 0.49, 0.73 |
age group | ||||||
<55 | 56.8 | 93.2 | 75.8 | 85.3 | 0.54 | 0.39, 0.69 |
⩾55 | 70.7 | 86.7 | 82.9 | 76.5 | 0.58 | 0.41, 0.75 |
level of education | ||||||
less than primary schooling | 69.1 | 88.3 | 81.0 | 79.8 | 0.59 | 0.46, 0.71 |
primary schooling or higher | 41.2 | 95.6 | 70.0 | 86.7 | 0.43 | 0.18, 0.69 |
current smoker | ||||||
never | 67.7 | 90.9 | 82.1 | 82.0 | 0.61 | 0.48, 0.73 |
ever | 47.1 | 92.5 | 66.7 | 84.5 | 0.44 | 0.19, 0.69 |
alcohol drinker | ||||||
any amount | 63.0 | 83.9 | 77.3 | 72.2 | 0.47 | 0.25, 0.70 |
none | 63.8 | 93.2 | 80.4 | 85.4 | 0.60 | 0.48, 0.73 |
body mass index | ||||||
normal | 55.6 | 93.5 | 62.5 | 91.5 | 0.51 | 0.20, 0.83 |
overweight | 55.6 | 91.0 | 74.1 | 81.6 | 0.50 | 0.33, 0.67 |
obese | 72.5 | 89.7 | 87.9 | 76.1 | 0.62 | 0.45, 0.79 |
previous conditions | ||||||
cardiovascular* | 85.7 | 82.4 | 80.0 | 87.5 | 0.68 | 0.42, 0.94 |
diabetes | 81.3 | 77.8 | 86.7 | 70.0 | 0.58 | 0.25, 0.91 |
PV+: positive predictive value; PV−: negative predictive value; 95% CI: 95% confidence intervals for κ. *Cardiovascular: myocardial infarction, stroke, angina, other cerebrovascular.